Ultra-wideband miniaturized electromagnetic bandgap structures embedded in printed circuit boards: theory, modeling and experimental validation

This work presents a novel design for electromagnetic bandgap (EBG) structures embedded in printed circuit boards (PCB). The presented design is able to mitigate switching noise in a power distribution network (PDN) on an unprecedented range of frequencies, while having a very compact, miniaturized and practical structure. The theory of operation of this design is presented using a new equivalent circuit model for embedded EBG (EEBG) structures. The model based on the transmission line theory and cascaded structures, by employing a simple lumped-element substitute for the patch-via structure, presents a first order, but detailed, quantitative analysis of the filtering properties of the metallo-dielectric EBG structure. Laboratory PCB prototypes were fabricated and tested revealing appreciable suppression of noise testifying to the effectiveness of our design.